Elevator



(No Model.)

T: J. UNDERWOOD. ELEVATOR.

N0.448,699. Patented Mar.2-4,1891.

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NiTnD STATES ATENT OFFICE.

THOMAS J. UNDERIVOOD, OF DECATUR, ILLINOIS.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 448,699, dated March24, 1891.

Application filed eptemher 1 5., 1890. Serial No. 364,965. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS J. Unnnnwoon, of Decatur, in the county ofMacon and State of Illinois, have invented certain new and usefulImprovements in Elevators, of which the following is a specification.

This invention consists in the details of construction and combinationsof parts here inafter set forth and claimed.

In the drawings accompanying and forming a part of this specification,Figure 1 is a side view of an elevator embodying my invention. Fig. 2 isa vertical section through the head of the elevator. Fig. 3 is a sideview, enlarged, of the upper and inner sprocketwheel and the archedplate that coaets with the sprocket-wheel and with the drag buckets.Fig. 4 is a plan or top view of the mechanism shown in Fig. 3. Fig. 5 isa side view of a drag-bucket and section of chain. Fig. 6 is an enlargedview of the chain-adjuster, seen also in Fig. 1. Fig. 7 is a perspectiverepresentation of the bucket.

The elevatoncasing 1 has the head 2 and the discharge-opening 3. Strap 5extends across the upper edge of head 2, forming an acute angletherewith. Strap 6 extends across the upper end of the elevator, forminga right angle therewith. The cap 4 has an acute angle adapted to strap5, a right angle adapted to strap 6, and it is further secured to thetop of the elevator by a hook 8, which engages pin 7. Power is impartedto the elevating mechanism through sprocket-wheel 9, which is keyed 011the shaft of the inner wheel 12. The partition 10 has the upwardextension 11, which curves to conform to the periphery of wheel 12, isslotted centrally to receive such wheel, and extends to a point aboveand in line with the vertical center thereof. The chain 13 has shallowdragbuckets 14 at suitable intervals, and it runs over wheel 12 andaround another wheel at the foot of the elevator. Thebuckets 14 are eachin line with the lower pivot of the link to which they are secured. Theyhave an overshot action, and they are designed to be run at considerablespeed. They each have a plane-surfaced part 14: raised above theconcavity, and in such part is recess lat to admit the chain, and hole14. to receive the securing bolt, which passes through the bracket ofthe link and through the bucket and secures them together. The frame 15is secured to the lower end of the elevator, and it provides slidingbearings for bar 17. The bar 17 provides a bearing for the shaft of thelower sprocket-wheel, and it has a numberof holes in its upper end,through one of which pin 18 passes. hen the pin 18 is withdrawn from ahole in the bar, the lower sprocket-wheel automatically adapt-s itselfto the length of the chain, after which the new position may be madepermanent hy inserting the pin through the hole in the cross-bar offrame 15 and through the hole of the bar that coincides therewith. Theposition of the buckets with relation to the lower pivots of theirrespective links causes the buckets to swing away from the side of theelevator whenever they come in contact therewith, thus giving goodclearance and avoiding the possibility of a block and consequentbreakage. As the buckets pass over the upper wheel the plate 11 aids inretaining the grain until it is thrown forward and to some extent upwardby centrifugal force. The cap 4 is raised from the elevator bydisengaging the hook, raising the rear end from contact with strap 6,and withdrawing the front end from under strap 5.

I claim- 1. In combination with sprocket-wheel 12, chain 13, andovershot buckets 14., the curved plate 11, slotted to receive the wheeland following the periphery thereof to a point in vertical alignmentwith its center, as set forth.

2. In combination with a sprocket-chain, a drag-bucket rigidly securedto a side of a link of the chain in line with the lower pivot thereof,as set forth.

3. In combination with chain 13, the concavo-convex bucket 1 1, havingthe central elevation 14., hole 1r and recesslat, as set forth.

In testimony whereof I sign my name in the presence of two subscribingwitnesses.

THOMAS J. UNDERWOOD. Attest:

I. D. WALKER, L. P. GRAHAM.

